4.In 2009, the Call of Duty Endowment — or C.O.D.E. — was founded with the goal of helping veterans find quality jobs.

This Activision-supported nonprofit continues to fund the most effective and efficient veteran job placement organizations in America. On average, every $1,510 provided to its funded nonprofits has placed a veteran in a job. To learn more or donate to the cause, visit C.O.D.E. today.

5.An estimated 32.3 quadrillion shots have been fired by gamers across the entire Call of Duty franchise.

To put this into perspective, there are roughly 1 to 10 quadrillion ants alive on Earth. There have been over three times as many shots fired in Call of Duty than there are ants on planet Earth. Chew on that for a minute.

6.Call of Duty's daily players could fill 80 of the world's largest sports stadiums.

7.Classic adventure game Zork is fully playable in Call of Duty: Black Ops.

If players shake hero Alex Mason free of his interrogation room bonds in the game's main menu, they'll find an interactive computer terminal that comes preloaded with one of the greatest text adventure games of all time.